embrasure(redirected from labial embrasure)
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1. An opening in a thick wall for a door or window, especially one with sides angled so that the opening is larger on the inside of the wall than on the outside.
2. A flared opening for a gun in a wall or parapet.
[French, from embraser, to widen an opening.]
1. (Fortifications) fortifications an opening or indentation, as in a battlement, for shooting through
2. (Architecture) an opening forming a door or window, having splayed sides that increase the width of the opening in the interior
[C18: from French, from obsolete embraser to widen, of uncertain origin]
1. an opening in the wall of a fortification through which a cannon may be fired.
2. a splayed enlargement of a door or window toward the inner face of a wall.
[1695–1705; < French, =embras(er) to enlarge a window or door opening, make an embrasure]